ADVANCED MATERIALS
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2016
·Vol. 28
·期 10
·2037-2042
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IF 18.96
Hewei Zhao,Yonghai Yue,Youwei Zhang,Lidong Li,Lin Guo
Graphical A novel ternary artificial nacre is developed through a vacuum-assisted filtration method, with reinforced ultrathin amorphous alumina that is grown in situ on the surface of GO. This ternary artificial nacre simultaneously shows exceptional strength and toughness, which have, up to now, been considered to be mutually exclusive. This novel material will play a role in the structuring of future materials.
研究领域:
材料科学
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纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MATERIALS & DESIGN
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2024
·
IF 7.6
Rui Ruan,Behzad Shiroud Heidari,Peilin Chen,Junjie Gao,Ziming Chen,Lianzhi Chen,Euphemie Landao-Bassonga,Yongquan Wang,Lingqiang Chen,Bing Wang,Minghao Zheng
Nacre of Pinctada maxima is a natural biomineralized matrix, appeared 7 million years before hominins. In this study, we converted nacre into a self-setting particle bound with multiple calcium orthophosphates that reassemble mammals’ bone mineral matrices for induction of bone regeneration. The nacre-based calcium orthophosphates composite (NCOC) exhibited a compression strength of 10 MPa, which is superior to human trabecular bone. In vitro bioactivity tests revealed the formation of apatite with nano-porous flake-like crystals on the composite surface that mimic HA structure of a human bone matrix. NCOC demonstrated efficient attachment and proliferation of osteoblast cells, promoting osteogenic differentiation by increasing expressions of RUNX2 and OPN . In vivo studies using rabbit back fascia demonstrated that NCOC displays better bone healing and biocompatibility than conventional bone substitute apatite in critical bone defect models. The degradation of calcium carbonate crystal in vivo does not compromise structural integrity of NCOC. Overall, our data showed that NCOC produced through self-setting reactions, presents advantages such as accelerated biodegradation and osteostimulative properties, making it a promising bone substitute for effective bone regeneration.
研究领域:
生物材料学
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骨科医学
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组织工程学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED MATERIALS
·
2021
·Vol. 34
·期 9
·2108267
·
IF 30.849
Yu-Feng Meng,Yin-Bo Zhu,Li-Chuan Zhou,Xiang-Sen Meng,Yu-Lu Yang,Ran Zhao,Jun Xia,Bo Yang,Yu-Jie Lu,Heng-An Wu,Li-Bo Mao,Shu-Hong Yu
The high fracture toughness of mollusk nacre is predominantly attributed to the structure-associated extrinsic mechanisms such as platelet sliding and crack deflection. While the nacre-mimetic structures are widely adopted in artificial ceramics, the extrinsic mechanisms are often weakened by the relatively low tensile strength of the platelets with a large aspect ratio, which makes the fracture toughness of these materials much lower than expected. Here, it is demonstrated that the fracture toughness of artificial nacre materials with high inorganic contents can be improved by residual stress-induced platelet strengthening, which can catalyze more effective extrinsic toughening mechanisms that are specific to the nacre-mimetic structures. Thereby, while the absolute fracture toughness of the materials is not comparable with advanced ceramic-based composites, the toughness amplification factor of the material reaches 16.1 ± 1.1, outperforming the state-of-the-art biomimetic ceramics. The results reveal that, with the merit of nacre-mimetic structural designs, the overall fracture toughness of the artificial nacre can be improved by the platelet strengthening through extrinsic toughening mechanisms, although the intrinsic fracture toughness may decrease at platelet level due to the strengthening. It is anticipated that advanced structural ceramics with exceeding performance can be fabricated through these unconventional strategies.
研究领域:
材料科学
·
仿生学
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DOI
PubMed
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
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2021
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IF 7.267
Xianglei Liu,Yanan Song,Qiao Xu,Qingyang Luo,Yang Tian,Chunzhuo Dang,Haolei Wang,Meng Chen,Yimin Xuan,Yongliang Li,Yulong Ding
Directly absorbing sunlight and on-site storing thermal energy via phase change processes are promising to achieve efficient and fast solar-to-thermal energy storage. However, the performance is severely inhibited by intrinsically low thermal conductivity and poor optical absorption capability of phase change materials (PCMs). We propose a strategy to achieve integrated efficient solar-to-thermal conversion and ultrafast energy storage by developing nacre-like ceramics embedded with titanium nitride (TiN) nanoparticles (NPs) contained PCMs. A high thermal conductivity of 25.63 W m −1 K −1 compatible with large phase change enthalpy of 157.93 kJ/kg are demonstrated. The excellent performance is attributed to ordered arrangement of silicon carbide ceramics and erythritol PCMs, just like microstructure of natural nacre . Meanwhile, the solar absorptance is improved by exciting localized plasmon resonances of TiN NPs in a broad band. Combination of high thermally conductive biomimetic skeletons with volumetric absorptive PCMs leads to a prominent enhancement of solar-to-thermal energy storage rate by 864%. This work paves a way for the application of ceramics in rapid and efficient solar energy harvesting and thermal energy storage .
研究领域:
材料科学
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能源工程
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产品关联
DOI
高影响因子
COMPOSITE STRUCTURES
·
2023
·
IF 6.3
Yong Mei Chen,Dian Dian Dong,Ning Zhang,Zi Yang Wang,Yang Yang,Yuan He
Hydrogel nanocomposites have been enthusiastically researched as promising candidates with cost-effectiveness and sustainability for solar steam generation and flexible electronics. Based on conductivity derived from salt ions and superior photo-vapor conversion of photothermal nanoparticles , hydrogel nanocomposites hold great potentials for ionotronics and desalination . Here, we report a mechanically robust and multifunctional gel-nacre nanocomposite based on carbon black (CB) nanoparticles strategically embedded in gel-nacre matrix, a physical crosslinked hydrogel reinforced via freeze–thaw and salting out with microphase separation structures. The CB nanoparticles play double roles of acting as nano-crosslinks and providing photothermal conversion capability, coupling gel-nacre matrix with shrinking tendency in saline, contributing to synergistical reinforcement of mechanical performances under saline conditions. The consequent CB@gel-nacre nanocomposite achieves comprehensive mechanical advantages (large strength , high toughness, ductility, and rapid self-recoverability), excellent electrical properties (good conductivity, high sensitivity, fast strain response) as well as photothermal conversion capability. Such versatile gel-nacre nanocomposite provides new opportunities for flexible devices in various scenarios such as ionotronics and desalination.
研究领域:
材料科学
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能源科学
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
POLYMER
·
2025
·
IF 4.5
Jinping Guo,Guangyu Zhu,Xi Lu,Yanxia Cao,Yanyu Yang,Jianfeng Wang,Wanjie Wang
Efficient utilization of clean solar thermal energy remains for addressing the global energy challenges. Ti 3 C 2 T x MXene exhibits exceptional thermal conductivity and mechanical strength, however, its incorporation into polymer composites is hindered by weak interfacial interactions and poor dispersion. This study presents a covalent engineering strategy to construct MXene/carbon nanotube (CNT) hybrid fillers through esterification crosslinking, where polyacrylic acid (PAA) bridges hydroxyl-rich polydopamine-coated CNTs and MXene nanosheets. The resulting polyvinyl alcohol/MXene/CNTs (PMC) composite films fabricated through solution casting exhibit a unique gradient deposition architecture. The optimized PMC-10 film has excellent mechanical properties with a tensile strength of 216 MPa and a Young's modulus of 3.07 GPa, which are 2.8 and 5.1 times higher than those of the original PVA, respectively. Meanwhile, the composite simultaneously exhibits dual-mode thermal regulation capabilities: daytime photothermal heating enhancement of 45.43 °C and nighttime radiative cooling reduction of 7.47 °C. This diurnal thermal gradient enables continuous 24-h thermoelectric generation. Furthermore, the PMC films display rapid ice-melting capabilities, efficient heat dissipation, and improved flame retardancy. This work establishes a paradigm for designing 1D/2D covalent hybrid fillers in polymer composites that simultaneously enhance mechanical properties and multifunctional performance, significantly expanding their potential for sustainable energy applications.
研究领域:
材料科学
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聚合物复合材料
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纳米技术
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热管理
·
可持续能源
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）